Device for stapling of endless paper web or similar material



Feb. 24, 1970 o. OLSSON 3,497,126

DEVICE FOR STAPLING OF ENDLESS PAPER WEB OR SIMILAR MATERIAL Filed Feb.15, 1967 INVENTOR- AxeL O/o'F Dlss n wil 5% 1 United States Patent3,497,126 DEVICE FOR STAPLING OF ENDLESS PAPER WEB OR SIMILAR MATERIALAxel Olof Olsson, Enskede, Sweden, assignor to Ingeniorsfirma OlofOlsson AB, Stockholm, Sweden, :1 corporation of Sweden Filed Feb. 13,1967, Ser. No. 615,760 Claims priority, application Sweden, Feb. 18,1966, 2,136/ 66 Int. Cl. B27f 7/06 US. Cl. 227-81 1 Claim ABSTRACT OFTHE DISCLOSURE A device for stapling of an endless paper web or similarmaterial running continuously between for example a receiving roll andan adjacent stapling roll, having the same directional movement, by wayof a stapling device, located in the stapling roll. The stapling devicecarries a ready cut staple and brings the same to be stitched throughthe paper web against the receiving roll, whereby the stapling device isarranged to receive a staple blank, cut off by a cutting device from awire supply, and to carry said staple blank past a staple bending unit,located outside of the stapling roll. The 'wire cutting device comprisestwo cooperating cutting members, one of which is mounted on and rotatestogether with the stapling roll, and the other one comprising a cuttingmember, located in fixed position outside of the stapling roll.

The present invention relates to a device for stapling of an endlesspaper Web or similar material, running continuously between for examplea receiving roll and an adjacent stapling roll, having the samedirectional movement, by way of a stapling device, located in thestapling roll, which stapling device carries a ready cut staple,bringing the same to be stitched through the paper web against receivingroll, whereby the stapling device is arranged to receive a staple blank,cut off by a cutting device from a wire supply, and to carry said stapleblank past a staple bending unit, located outside of the stapling roll.The object of this invention is to provide a stapling device capable ofworking at a considerably higher operational speed than known staplersof the prior art. This object is achieved by the wire cutting devicecomprising two cooperating cutting members one of which is mounted onand rotates together with the stapling roll, and the other onecomprising a cutting member, is located in fixed position outside of thestapling roll.

An embodiment of the invention will now be described below withreference to the accompanying drawing, in which:

FIG. 1 is a schematic view of the device as seen in axial direction, and

FIG. 2 is a cross sectional partial view along line II-II in FIG. 1.

The endless paper web 1 to be stapled is conveyed downwards betweenreceiving roll 2 and adjacent stapling roll 3, rotating in the samedirection. Stapling roll 3 is provided with a staple shaping stitchingdevice 5 located in guiding duct 4 extending in chordwise direction,said device being longitudinally displaceable, biased by spring 6. Twolegs 7 of the forkshaped stapling device project a small distanceoutside the periphery of stapling roll 3, said legs being provided withgrooves 8 in their end surfaces to receive staple blank 9. At an angulardistance of approximately 140 from receiving roll 2 in oppositedirection to the rotating movement there is provided a pulley 10cooperating with stapling device 5, which pulley is adjacently locatedto and running in the same direction as stapling roll 3. Said staplingroll 3, which may suitably "ice have a diameter of 180 mm., is arrangedto rotate at a speed, ie at an r.p.m., which is 1.8 times greater thanthe speed of pulley 10, the diameter of which may suitably be mm. andits width may be of a dimension to permit said pulley to freely rotatebetween the legs 7 of the fork shaped staple device. The wire bendingpulley 10 which, as seen in FIG. 2 has a smooth periphery, and a smoothcircumference, has a peripheral speed which is lower than that of thestapling roll 3. Located in fixed position at a further distance alongthe periphery of staple roll 3, there is a wire feed arrangementcomprising a guiding member 11, provided with guide hole 12, forstitching wire 13. A fixed support 14 for the wire is positioned belowpulley 10 to engage and stabilize the wire during the cutting operation.The wire feed device is arranged to supply predetermined lengths ofstitching wire, each length corresponding the material required to forma complete staple, the feeding being synchronized with the staplingoperation in conventional manner. Once a piece of wire has been advancedand staple mechanism 5 of the stapling roll is moved forward towards thewire, the latter is received in grooves 8 of legs 7 of the staplingmechanism, being cut off at the point of exit from wire guiding hole 12by shear action between the faces of leg 7 and guide member 11. Thecutting off point is located adjacent or close to the first point ofcontact of the staple material with the periphery of pulley 10. Thus,the cutting oil operation of the wire takes place approximatelysimultaneously with the initiation of the bending operation of thestaple material, thereby eliminating any movement of the staplematerial, before it is clamped between pulley 10 and the legs of thestapling mechanism. During the continued movement of staple mechanism 5together with the stapling roll, pulley 10 is introduced between legs 7of the staple mechanism, bending the wire to staple shape. When thestapling mechanism leaves the pulley the legs pass a guide bar 15,located in fixed position between the pulley and the stapling mechanismand following the curvature of the stapling roll, said guide barpreventing the staple to be thrown out by centrifugal force. When staplemechanism 5 approaches receiving roll 2, it is pushed by roll 2 in aninward direction in its guiding duct 4, so that the staple will beliberated and be ready to penetrate the paper web being clinched betweenhammer 16 of the stapling roll and anvil 17 of the receiving roll. Atthe side of stapling mechanism 5 a rabbet 18, adapted to resilientlyengage legs 7, may be arranged to displace said legs in order to reducewear and prevent paper web damage.

What I claim is:

1. In a device for stapling an endless web of paper or similar material,the combination comprising a receiving roll, a stapling roll, said rollsbeing mounted for rotation in opposite directions with their peripheriesadjacent each other and between which the endless web is fed, a staplingmechanism located on said stapling roll and which functions to bring aready cut staple to and be stitched through the web against theperiphery of said receiving roll, said stapling mechanism comprising apair of parallel spaced legs projecting exteriorly of the periphery ofsaid stapling roll and which are arranged to be pressed inwardly intosaid roll, a wire feed device synchronized with rotation of saidstapling roll and which supplies predetermined lengths of stitching wireeach of which is convertible into a staple, the outer ends of saidparellel spaced legs of said stapling mechanism including alignedgrooves which receive one of said predetermined lengths of stitchingwire as said stapling roll is rotated past said wire feed device andeffect a cut off of said length by shear action between a face on one ofsaid legs and an adjoining face on said wire feed device, a fixedsupport engaging and stabilizing said length of stitching wire duringthe cut-off operation, and a staple bending V,

pulley mounted for rotation in a direction opposite to that of saidstapling roll, said staple bending pulley having a peripheral speedlower than that of said stapling roll, a smooth periphery positionedadjacent the periphery of said stapling roll and a width slightly lessthan the distance between said legs of said stapling mechanism, and saidstaple bending pulley being so located as to first engage the length ofstitching wire held in said grooves of said legs at substantially thecut off point and thereafter progressively bend the length of stitchingwire into staple form as the full width of the periphery of said bendingpulley extends progressively deeper into the space between saidoutwardly projecting legs upon rotation of said stapling roll.

.. References Cited UNITED STATES PATENTS 12/1940 Nolan 22781 12/ 1944Zuckerman 22781 1/ 1958 Turrall et al. 22781 11/1960 Steidinger 227816/1962 Worthington et al. 227-81 FOREIGN PATENTS 4/1950 Great Britain.

TRAVIS s. McGEHEE, Primary Examiner R. L. SPRUILL, Assistant Examiner

